Adjustment for brake-shoes.



L. ZINK. ADJUSTMENT IOR BRAKE SHOES.

APPLICATION FILED APR. 13. 1911.

Patiented July 4, 1911.

,u in aras ranas ric. y

LZIAN ZINK, OF DETROIT, MICHIGAN.

ADUSTIVIENT FQR BRAKE-SHOES.

ceases.

Specication of Letters Patent.

Patented July 41, 1911.

Application le April 13, 1911. Serial No. 620,758.

T o all whom 'it may concern:

Be it known that I, LUZIAN Zinn, a citizen of the United States ofAmerica, residing at De roit, in the count-y of .lVayne and State ofMichigan, have invented certain new and useful Improvements inAdjustment for Brake-Shoes, of which the following is a specification,reference being had therein to the accompanying drawings.

ln adjusting the levers, hangers or like portions which carry the brakebeams or brake shoes of a car truck, it is usual to arrange them to takeup for wear or the like byl means of a spacing member connecting theirfree ends, and having a turn-y buckle or other screwthreaded adjustingsleeve for obtaining the necessary extension or contraction desired.Such devices frequently work loose under the ar of the running truck andthrow the connected parts `out of adjustment.

- This invention relates to a brake attach- Y ment for holding brakehanger arms, levers,

links or the like in proper position. together with means for varyingthe length of the adjusting member to t different trucks for wear whenonce in features oi' ythe invention, mounted on a railway truck portionsof which are shown da grammatically; Fig. 2 is a View in longitudinalsection through the adjustment; Fig.

3 is a view in side elevation of the adjustment partially broken away;and Fig. i is a plan view of 'the adjustment.

As herein indicated, a pair of f truck wheels 1 has brake shoes showndiagrammatically, thatmay ,be mounted in any pre-- ferred manner, as forexample, on hangers" or armsA 3, swinging from the body of the truck,the latter not being shown. The 4adjustment 4 connects the lower endsoli the v brake levers 3 to hold them in such relatipn that the brakeshoes 2 operate properly uponthe wheels 1 when thereto.

'As herein shown in preferred form, th@

power is applied "Lment' therewith, a cam journaled between the outerbars and adapted to engage4 the adjustment consists of an inner bar 5,suitably ribbed and flanged for strength 'and lightness, having abifurcated end 6 adapted to embrace one of the brake levers 3 to whichit is connected by a pivot pin 7 passing through either one of a pair of`apertures 8 in the forked end. The pivot pin is preferably secured `inplace by cotters 9 which engage transverse grooveslO in the outer facesof the arms of the forks 6 and thereby prevent the pin from turning andwearing on the member 5. The member 5 has longitudinal slots 11 whichare engaged by clamping bolts 12 passing through similar .oppositelydisposed side members 13 whose separated ends beyond the member 5 areadapted to embrace the other braliieflever 3 and have a series ofapertures 14 for* holding a' pivot pin 15 that passes througlbthe lever3', cot-ters 16 holding the pin and engaging grooves 1T to prevent thepin from turning.

A cam plate 18 isjournaled between the separated plates 13 to bearagainst the beveled end 19 of the adjustment metil-ber 5. Preferably thecam turns on oppositely disposed bosses 2O engaging ali-ned ope ings inthe members 13. A series of holes ln'ear the periphery of the cam may beybrought severally intoj register with a longitudinal slot indicated at22 in the members 13 and a locking pin Q3 is thrust therethrough to holdthe cam in adjusted position. For convenience the hub or bosses 20 ofthe cam have a squareor angular aperture for the insertion of the stemof a wrench. As a result of this construction the adjustment is obtainedwhich may be quickly secured in place and the parts broughtto proper,Working 'position by turning the cam thereby projecting the inner memberuntil the required position of the brake shoes is obtained. By settingup theclamping bolts and placing the lock- .ing pin in position in thecam the adjustment 'is held positively so that it cannot work looseunder jars.

Obviously, changes in thedetailsoi co1;- struction may be made withoutydeparting from the spirit of the invention and l do not care tolimitmyself to any particular form or arrangement of parts.

What-'I claim is:

1. An adjustment comprising an innerbar, a pair of -outer bars insliding engageinner end of the inner member, and means for locking theparts in adjusted position.

2. An adjustment for truck brake shoes comprising a single memberadapted to be positively secured at one end to a depending member of atruck, a pair of outer members longitudinally adjustable on the innerinember adapted to be secured at their outer ends to a depending memberof the truck, a cam rotatable between the outer members adapted to shiftthe innermember longitudinally, and means for locking the parts inadjusted position.

3. An adjustment for truck brake shoes, Comprising an inner bar4 havingan outer bifureated end adapted te be pivotally secured toa truckmember, a. pair of outer bars held in spaced relation by the inner baron Which they are longitudinally adjustable and adapted at their outerends for pivotal attachment to a truck member, a cam journaled betweenthe outer bars and adapted to shift the bars` longitudinally on eaeuother when turned, and means for locking the bars and cam in adjustedposition.

4. The combination with hanging members of a truck, ot' an adjustmentconsisting of an inner bar having an outer forked end adapted toembrace one of said truck members and provided with a series of pivotpin holes, outer bars held in spaced relation by the inner bar on whichthey are longitudinally adjustable, and provided at their clamping boltsin the outer bars engaging longitudinal slots in the inner bar, a cam'having integral bosses journaled in eorrespending openings in the outerbars and bearing against the end face' of the inner bar, a pin passingthrough longitudinal slots on the outer bars and any one of a series ofpin holes in the cam adapted to be brought into register With the slots,pivot pins passing through the outer ends of the bars and the hangingmembers of the truck and cot ter pins passing through transverseopenings in the pivot pins and lying in transverse grooves formed in therespective outer faces of the bar ends.

In'testimony whereof I a'liix my signature in presence oit twoWitnesses.

LUZIAN ZINK.

Witnesses C. R. STIUKNEY, ANNA C. ltAvlLun.

outer ends with a series of pivot pin holes,

